Concrete-mixer.



No. 850,469. PATENTED APR. 16, 1907. w. c. DAYHOFP.

CONCRETE MIXER. APPLICATION FILED MAY 14. 1906.

2 SHEETS-SHEET 1.

No. 850,469. VPATENTED APR. 16, 1907.

- W. 0. DAYHOFF.

CONCRETE MIXER. APPLIOATION FILED MAY 14. 1906.

Z 2 SHEETS-SHEET 2.

n'rnn T-sTArEs PATENT QFFICE.

Specification of Letters Patent.

Patented s in 16, 190?.

\ Application filed May 14, 1906. Serial No. 316,673.,

To all whom it mayconcern. p

' Be it known that I, WILLIAM C. DAYHOFF,

a citizen of the United States, residing at Bradley, in the county of Kankakee, State of 5. Illinois, have invented certain newand useful Im rovements in Concrete Mixers,- of

which t lhe following is a specification, refer ence being'had to the-accompanying drawings.

1o This invention relates toimprovements in concrete-mixers, and'especially to that, class of machines for. mixing concrete that make use of a revoluble drum for the mixing-chamber. Its object is to provide a new 'andlim- I proved arrangement of the parts which not only insures these parts being held securely in working positiombut also permits them to be readily disengaged from the rest of the g it and as machine for the purpose of 'movin 2o easily reassembled for work.-

Another object is to'provide new and improved means for. delivering the mixed concrete to a wheelbarrow or other receptacle without'having to discontinue the operation of the machine, thus increasing materially the amount of workable to "be done by the machine. This construction also' does away with the necessity for tipping the drum, which has been necessary in some construc- 0 tions for emptying the drum of the mixed material. t

A further object is toimprove generally the construction of concrete-mixers in sundry details hereinafter pointed out.

3 5 I accomplish these ob ects by means of the devices shown in. the drawings and hereinafter specifically described.

That which I believe to be, new will be,

pointed out in theclaims. 4.0 In the drawings, Figure 1 is .an end eleva tion'of my improved machine. Fi n2 is a section taken at line 2 2 of Fi 3. i 3 is a section taken at line 3 3 of Fig. 1. ig. 4 is a detail, artly in section, showing one of the devices or elevating the mixed material.

Fig. 5.is a detaihbeing an end view of the part shown in Fig. 4. Fig. 6 is a detail show mg one ofthe brackets and rollers on which ,the drum is mounted. Fig. 7 is a section 5 taken atline ,7. 7 of Fig. 6, showing also the upright to which the bracket is attached.

Referring to the drawin s, 8 9 indicate side bars, and 10 cross-bars, o the base-frame of I the machine, the cross-bars 10 being mor- 5 5 tised in the side bars 8 9 or otherwise suitably secured thereto. As best shown in Figs. 1 and 3,, from each of these side bars 8 9 rise fa pair of uprights, (indicated by 11 and 12, respective y,) Which upri hts, together with cross-bars 13, form'standard's for sup-- porting the working parts of the machine. Each standard is reinforced by brace-rods 14 15, extending diagonally from the uprights 11 12 to the "side bars 8 9, respectively, and firmly secured to these parts. -6 5' Each of the standards 11 12 has attached to its inside face along the cross-bar13, by means of bolts, a heavy metal plate 16, from each end of which rises a bracket 16*, 111176? gral with said plate, as-shown in Fig. 7, to receive a roller 18, which is revolubly mount. ed on a bolt .17, whichj' passes throu h the up er endof the arm 16* and one of t e uprig ts;1112. i 19 'indicates a drum, preferably of sheet metal, consisting of the cylinder 20 and the end disks 21, whichare riveted or otherwise suitably joined thereto. Each of these end disks 21is provided with a large round central opening 22, at the ed 'e of which there is riveted or otherwise suita ly secured an. annular channel-iron 23. As shown in Figs. 6

and 7, the 'Webs of these channel-irons are adapted to rest upon the rollers 18,-: thus making thedrum 19revoluble.

24 indicates a pair of bearing-blocks suit ably attached to about the middle points of two of the cross-bars 10, which blocks forma bearing for the shaft 25, upon which is secured between the blocks 24 a sprocket-wheel 26.- On one end of the shaft 25 is secured a sprocket-wheel 27, through which. said shaft,

25 is driven from any suitable source of power. Upon the outside of .the drum 19 is secured a sprocket 28 in alinement with the 9 5 sprocket 26, from which the drum is driven by means of the chain 29. t

30 indicates a guard, of metal or other suitable material, running under the chain 29 from one to another of the cross-bars 10.

"From the top of each upright 11 to the top' of the upright "1 2,1 directly opposite it and resting upon these uprights, are two bars 31,11 having holes intheir flattened ends which fit overpins 32 in-the upper ends of the uprights '11 12. p Referring to Fig. 3, 33 34 indicate chutes,

each comprising a bottom plate and two side;

plates, which in the construction shown are of sheet metal and are made integral. Near 1 1o tion s own there is face of which 31, holding thech'ute at the proper elevation.

' N ear the upper endof the chute 34 are riveted .on each side two angle-irons 3 7, which engage,

the uprights 1 1 and maintain the chute at its proper angle. 38 39 indicate 'two blocks suitably secured to the upri hts 11 to hold thechute 34 at the proper e levation. It is thus seen that the rods 31 and chutes 33 and 34 can be very readily applied to the machine anddisengaged therefrom, and yet are a the cylinder.

very securely held in position under working conditions, I

indicates a rod extending between the twoend disks and having its ends mounted in the same a short distance from the side of Although I have shown only two ofsuch rods, it is understood that any appropriate number may be employed.

41 indicates a rod which extends through the drum and which has secured upon it a position shown in Fig. 4, so far as the longi 41 for regulating the position '45 ends of the'drum',

shown in dotted lines plate 42, which extends almost'the full length of the drum, as shown in Fig. 4. On one end of the rod 41 is a head 43', between which and the end- 21 of the drum 19 is interposed a coiled spring 44. The rod 41 is mounted in the ends 21 of the drum 19 and is easily turned or slid therein. Hence the spring 44 normally holds the head 43 of the rod'awav from the drum, holding the plate 42 in the tudinal movement of the plate'is concerned. ,45 indicates a lever on the end of the rod the plate attached thereto.

46 indicates a rod'extending between the' against which rod the plate rest when-in the position in Fig.-'2. When the plate 42is in the position shown in solid lines in Fig. 2, the lever 45 is in the position sh'ownin solid lines in- Fig. 5, where it is. held by-thestop 47.- If it is desiredto change the position of the plate 42, the lever 45 is pulled out to a point beyond the, stop 47 against 42 is adapted to the action of the-spring 44, and the lever is turned to the position shown in dotted lines in Fig 5, when the plate will have assumed the position shown in dotted lines in Fig. 2,up'o n which the action of the spring. returns the late to its normal position, carrying the- .ever 45 again to a position where the stop 47 prevents displacement. I havedescribed only one of these plate devices, the other one shown being a duplicate of the one described;

the lower end of the chute 33 in theconstruc of the rod and The operation of the machineis as follows:

The plate 42 being in the position shown in solid lines in Fig. 2, power is-applied to the sprocket 25, driving the drum in" the direction indicated by the arrow in Fig.2. The materials to be mixed are then fed into the drum-through the chute 34. After two or three revolutions of the drum, or even after one, the materials will be found to be thorou hly mixed, the rods 40 and plates '42 ho ding momentarily arts of the materials, and thus facilitating t e mixing. While the drum is still beingrotated the plates 42 are turned to the position shown in dotted lines in Fig' 2 in the manner hereinbefore dee' scribed, and a'portion of the materials in the drum is raised by each plate'42 as these understood. The material so raised .slips off these plates into the chute 33', from where it is delivered onto the ground or into wheelbarrows or other receptacles, as desired. vAs a usual thing two or-three revolu tions are suflicient almost completely to empty the drum, although this would depend, of course, upon the amount of materials being mixed and upon the size and number of the plates 42. It is seen that no time is lost in intermittently stopping and starting the machine and no lifting-or tilting of the drumloaded with mixed materials is necessary. 7

Although I have described my invention as being in connection with a concrete mixer, it will be understood that v the machine provided with my improvements mi ht be used for mixing other materials, and do not desire' to limit my invention strictly to con crete-mixers. What I claim as myinven tion, and desire ,to secure by Letters Patent, 1s

1. In a concrete-mixer, the combination with arevoluble drum havingan opening in one end, and two uprights adjacent to said opening," of achute leadinginto said drum and having a diagonal housing across eachside slidabl-y enga ing one of said uprights, and a block on each of said uprights for supporting said chute.

In a concrete-mixer, the combination of a drum mountedrevdlubly between two, standards'and having 'an opening in each' end, a chute leading-from said drum, said chute having a diagonal housing on each side slidably'engaging one of said standards, parallel rods extending through said drum and connecting said standards, and a hook on eachside ofsaid chute ne'ar'itsupper end engaging said r0ds.- 1

,3. In a concrete-mixen the combination of a revoluble drum, a plate pivoted at its edge near the'inner surface of the drum and adapted to be swung into and out of position! to elevate the materials in the drum as it is rotated, means outside the drum for turning the plate into and out of elevating position and. looking it in place, and a rod 46, carried by the drum for supporting the-plate in eledrum for looking said lever in os'ition, said rod beingmovable longitndinal y to free said lever from contact with said sto and a plate secured to said rod inside said rum.

side sai 5. In a concrete-mixer, the combination with arevolub'le drum and a chute leading therefrom, of a rod slid'ably pivoted near the inner surface of the drum and extending through bothends of the drum, a head on one end of said rod-,a spring interposed between said head and said end of the drum, a lever. on the other end of said rod, a stop on the end of the drum for looking said lever in position, said rod being movable longitudinally to free said lever from contact withsaid sto and a plate'seoured to said rod indrum. l i I r WILLIAM C. DAYHOFF. Witnesses:

' WILLIAM H. DE BUSK,

MINNI A. HUNTER. 

